Put a vertical line in front of the Atlantic Ocean.
From this line push right side by 675 miles to the right and left side 675 miles to the left. Both sides will overlap on each other on the other side (so not widen, but shift the continents both Americas with Greenland closer to the Asia, so that they connect).

Basicly he wants to cut about 1350 miles of Bering Sea (Pacific Ocean) along with some land and widen the Atlantic by the same number. This will push the Europe to the east making Lisbon the place where Prime Meridian will cross.

I dont think his numbers are correct (you need just about 112 km to connect Alaska with Asia), but maybe he want to push it even more.

I agree that his post is very chaotic though.